- Porter Insulated Ceramic Bottle 12oz. The Porter Ceramic Bottle ushers in a new era of sustainable, reusable drinking vessels, thanks to ceramic design and thoughtful details. An elegant ceramic bottle hugs a double-wall, vacuum-insulated stainless steel frame, offering unparalleled temperature control to keep coffee piping hot and water icy cold. The matte silicone sleeve offers a firm, non-slip grip, while the fully ceramic interior and lip provide a pure and clean sip. The hidden interior threading means you’ll sip from a totally smooth, ceramic rim (like a mug!), while a generous wide-mouth opening gives visibility for spill-free filling and makes cleaning a cinch. This bottle marries luxe materials and insulation innovation for the perfect sip, hot or cold.